- Volume 27 Issue 5
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The Study on Changes of Exhaust Efficiency and Fine Particle Concentration at a Ventilation Opening by a Air Curtain Flow in a Subway Model Tunnel
지하철 모사터널에서 에어커튼을 이용한 환기구의 배기효율 및 미세입자 농도 변화 연구
- Received : 2011.07.29
- Accepted : 2011.09.22
- Published : 2011.10.31
In this study, a new tunnel ventilation method with a high velocity air curtain flow has been investigated for improving the ventilation exhaust efficiency and removing air pollutants in subway tunnels. At upper or lower position right downstream of a main duct connected with a ventilation opening, air curtain flows were suppled into the main duct where the air flow velocity was in the range of 2~6 m/s. Exhaust efficiency was monitored for both cases with and without air curtain flow for different air velocities, locations and injection angles of the air curtain. Particulate matter concentrations (PM10, PM2.5 and PM1.0) were also checked at both the main duct and ventilation opening before and after supplying air curtain flows. Lower air velocity of the main duct flow, higher air velocity of the air curtain led to higher exhaust efficiency and the air curtain condition of 30..inclined injection toward the main flow showed the maximum exhaust efficiency. The exhaust efficiency of about 24% without the air curtain could be improved to about 34% after using the air curtain flow. PM concentration decreased at the main duct and increased at the ventilation opening after using the air curtain flow. Therefore, the suggested method to use air curtain flows in tunnels will be probably one of the promising tools to reduce air pollutants in subway tunnels.
Subway tunnel;Particulate matters (PMs);Space separation;Natural ventilation
- Choi, H.W., I.J. Hwang, S.D. Kim, and D.S. Kim (2004) Determination of source contribution based on aerosol number and mass concentration in the Seoul subway stations, Journal of Korean Society for Atmospheric Environment, 20(1), 17-31. (in Korean with English abstract)
- Jung, H.-J., B. Kim, S. Maskey, J.-C. Kim, J. Sohn, and C.-U. Ro (2010) Source identification of particulate matter collected at underground subway stations in Seoul, Korea using quantitative single-particle analysis, Atmospheric Environment, 44(19), 2287-2293. https://doi.org/10.1016/j.atmosenv.2010.04.003
- Kim, S.D., J.H. Song, and H.K. Lee (2004) Estimation of traininduced wind generated by train operation in subway tunnels, Korean Journal of Air-Conditioning and Refrigeration Engineering, 16(7), 652-657.
- Lee, T.J., J.S. Jeon, S.D. Kim, and D.S. Kim (2010) A comparative study on PM10 source contributions in a Seoul metropolitan subway station before/after installing platform screen doors, Journal of Korean Society for Atmospheric Environment, 26(5), 469-591. (in Korean with English abstract) https://doi.org/10.5572/KOSAE.2010.26.5.543
- Sim, S.H., Y.S. Kim, H.S. Kim, C.M. Lee, S.K. Lee, and Y.M. Roh (2006) Emission rate estimation for the volatile organic compounds (VOCs) in newly constructed apartments using a mass balance model, Journal of Korean Society for Indoor Environment, 3(3), 247-259. (in Korean with English abstract)
- Song, D.K., B. Han, S.H. Jeong, W.S. Hong, W.H. Shin, H.J. Kim, S.H. Sim, and Y.J. Kim (2009) Ventilation control characteristics of train-induced wind by changing injection angle of air curtain, Proceeding of the Fall Conference of KOSAE, Kunsan University, 566-567.
- Tabarra, M., D. Abi-Zadeh, and S. Sadokierski (2004) Design of a modern subway ventilation system, Tunnels & Tunnelling International, 36(11), 48-50.